Viewing file:  hoist-register-pressure-3.c (1.13 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* { dg-options "-Os -fdump-rtl-hoist -fno-code-hoisting" } */
/* The rtl hoist pass requires that the expression to be hoisted can
be assigned without clobbering cc. For a PLUS rtx on S/390 this
requires a load address instruction which is fine on 64 bit but
cannot be used on 31 bit since it does a 31 bit add only. */
/* { dg-final { scan-rtl-dump "PRE/HOIST: end of bb .* copying expression" "hoist" { target { !s390*-*-* || lp64 } } } } */
#define BUF 100
long a[BUF];
void com (long);
void bar (long);
long foo (long x, long y, long z)
{
/* "x+y" won't be hoisted if "-fira-hoist-pressure" is disabled,
because its rtx_cost is too small. */
if (z)
{
a[1] = a[0] + a[2] + a[3] + a[4] + a[5] + a[6];
a[2] = a[1] + a[3] + a[5] + a[5] + a[6] + a[7];
a[3] = a[2] + a[5] + a[7] + a[6] + a[7] + a[8];
a[4] = a[3] + a[7] + a[11] + a[7] + a[8] + a[9];
a[5] = a[5] + a[11] + a[13] + a[8] + a[9] + a[10];
a[6] = a[7] + a[13] + a[17] + a[9] + a[10] + a[11];
a[7] = a[11] + a[17] + a[19] + a[10] + a[11] + a[12];
com (x+y);
}
else
{
bar (x+y);
}
return 0;
}
|
